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ACPI: scan: Constify acpi_dma_supported() helper function

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Constify arguments to acpi_dma_supported(). The function doesn't need
to change the content of the passed argument and when it's const it
allows to supply the result of other functions that may return a pointer
to a constant object.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
[ rjw: Subject edit ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Andy Shevchenko 2021-06-04 19:50:46 +03:00 committed by Rafael J. Wysocki
parent 5c1a72a0fb
commit 3d7c821c1d
3 changed files with 3 additions and 3 deletions
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2
drivers/acpi/scan.c
View File

@ -1404,7 +1404,7 @@ void acpi_free_pnp_ids(struct acpi_device_pnp *pnp)
* *
* Return false if DMA is not supported. Otherwise, return true * Return false if DMA is not supported. Otherwise, return true
*/ */
bool acpi_dma_supported(struct acpi_device *adev) bool acpi_dma_supported(const struct acpi_device *adev)
{ {
if (!adev) if (!adev)
return false; return false;

2
include/acpi/acpi_bus.h
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@ -586,7 +586,7 @@ struct acpi_pci_root {
/* helper */ /* helper */
bool acpi_dma_supported(struct acpi_device *adev); bool acpi_dma_supported(const struct acpi_device *adev);
enum dev_dma_attr acpi_get_dma_attr(struct acpi_device *adev); enum dev_dma_attr acpi_get_dma_attr(struct acpi_device *adev);
int acpi_dma_get_range(struct device *dev, u64 *dma_addr, u64 *offset, int acpi_dma_get_range(struct device *dev, u64 *dma_addr, u64 *offset,
u64 *size); u64 *size);

2
include/linux/acpi.h
View File

@ -911,7 +911,7 @@ acpi_create_platform_device(struct acpi_device *adev,
return NULL; return NULL;
} }
static inline bool acpi_dma_supported(struct acpi_device *adev) static inline bool acpi_dma_supported(const struct acpi_device *adev)
{ {
return false; return false;
} }